Getting back to the original subject, it's not about the kid's privacy, it's about the danger he posed to the community -- a danger he proved out.
Right, but at the time, they had no way of realy knowing what he'd do. And by all means, he should have been looked at harder after a death threat, but what they find about him his mental history, shouldn't be printed out, and mailed off to every parent, they could have gotten the police involved, and taken more disciplinary action, like expulsion.

He invited additional scrutiny by not only issuing a death threat (which could have been heat-of-the-moment) but by not being remorseful about having done so. Yeah, he apologized but it sounds pro forma if he didn't express remorse about a death threat.

very true, and I think because of that, the school should have looked at it less like he was just an ass for not apologizing, and treated it more like the issue wasn't resolved and that he was still being threatening.

In the OP, I don't have any problem with additional scrutiny being placed on someone who has issued violent threats and shown no remorse over them. Said individual has already demonstrated by his/her own actions a threat to the "life, liberty, and pursuit of happiness" by other citizens.

Ok, agreed. But that additional scrutiny doesn't require his entire personal life be published and handed out to every parent. At that point, I do think the school should have every right to dig into his life, and use what they find to support their discipline, or involve the authorities.